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Finding the Fourth Proportional to 423,059.62, 634,633.20 and 142,598.74

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Solution

The fourth proportional to 423,059.62, 634,633.20 and 142,598.74 is: 213,912.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,059.62 : 634,633.20 = 142,598.74 : x
  2. Step 2: Convert to fraction form
    423,059.62/634,633.20 = 142,598.74/x
  3. Step 3: Cross multiply
    423,059.62x = 634,633.20 × 142,598.74
  4. Step 4: Simplify right side
    423,059.62x = 90,497,894,682.17
  5. Step 5: Solve for x
    x = 90,497,894,682.17/423,059.62
  6. Step 6: Final answer
    x = 213,912.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.